The treatment of ballast water is not easy, as aggressive seawater, stubborn organic particles that stick and shellfish growth on and inside the corresponding filter systems can affect their functionality. With the BWT filters from BOLL & KIRCH, such problems do not exist: On the basis of its leading filter technology, BOLL & KIRCH has developed a filter for ballast water that has already been proven. The ballast water is pre-filtered reliably with the BOLLFILTER Automatic type 6.18.3.